FIG. 1 is a perspective view of a pump portion, showing the first embodiment of our new design;
FIG. 2 is a left side elevation view thereof;
FIG. 3 is a right side elevation view thereof;
FIG. 4 is a front elevation view thereof;
FIG. 5 is a rear elevation view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof;
FIG. 8 is a perspective view of a pump portion, showing the second embodiment of our new design;
FIG. 9 is a left side elevation view thereof;
FIG. 10 is a right side elevation view thereof;
FIG. 11 is a front elevation view thereof;
FIG. 12 is a rear elevation view thereof;
FIG. 13 is a top plan view thereof;
FIG. 14 is a bottom plan view thereof;
FIG. 15 is a perspective view of a pump portion, showing the third embodiment of our new design;
FIG. 16 is a left side elevation view thereof;
FIG. 17 is a right side elevation view thereof;
FIG. 18 is a front elevation view thereof;
FIG. 19 is a rear elevation view thereof;
FIG. 20 is a top plan view thereof;
FIG. 21 is a bottom plan view thereof;
FIG. 22 is a perspective view of a pump portion, showing the fourth embodiment of our new design;
FIG. 23 is a left side elevation view thereof;
FIG. 24 is a right side elevation view thereof;
FIG. 25 is a front elevation view thereof;
FIG. 26 is a rear elevation view thereof;
FIG. 27 is a top plan view thereof; and,
FIG. 28 is a bottom plan view thereof.
As mentioned above, the pump components and portions of the pump shown in broken lines in the figures depict unclaimed environmental subject matter, are for illustrative purposes only, and form no part of the claimed design. Similarly, unshaded portions that appear between broken lines or beyond boundary or break lines in the figures form no part of the claimed design.